Unresponsive after Maropitant (Cerenia) in cats

The FDA has received 103 reports of unresponsive in cats after Maropitant. That is 2.7% of all reports for this medicine, compared with 0.6% across reports for all cat medicines, so it is reported unusually often with this medicine.

103Reports

85%Marked serious

19%Recovered

48%Died or euthanised

1 daysTypical onset

How soon it started

Same day

38 42%

1–2 days

27 30%

3–7 days

9 10%

1–4 weeks

10 11%

Over a month

6 6.7%

How the animals did

Recovered

20 19%

Still unwell when reported

20 19%

Died

23 22%

Euthanised

26 25%

Not known

14 14%

Problems reported at the same time

49 48%

30 29%

27 26%

22 21%

17 17%

15 15%

15 15%

14 14%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Maropitant prevents vomiting and motion sickness.

Products with this ingredient include Cerenia. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Maropitant cause unresponsive in cats?: 103 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within 1 day of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Unresponsive with similar medicines

Unresponsive after Mirtazapine (Mirataz) 26 reports · 1.4% of its reports
Unresponsive after Capromorelin (Entyce) 28 reports · 3.4% of its reports

All reported side effects of Maropitant in cats · Medicines most reported with unresponsive